All areas of mass communication are surveyed. Man's earliest efforts as a communicator are considered, and what is known about the development of speech and writing is explored. Various theories (including mathematical ones) are reviewed which attempt to explain the processes of both personal and mass communication. Separate chapters focus on the book, newspaper, films, magazines, cartoons, radio, television (including public television and community antenna or cable television), the "information industry," and computer technology, as well as advertising and public relations. In each case, the author delves into the medium's history, describes how it functions, and considers its achievements, problems, and potential for good and ill. Finally, the impact of mass communication on public opinion is evaluated, and the issues of freedom, control, and responsibility in mass communication are discussed. (Author/JK)